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CVE-2026-54735
10.0 CRITICAL
- CVSS version (CVSS): 3.1
- Attack Vector (AV): Network (N)
- Attack Complexity (AC): Low (L)
- Privileges Required (PR): None (N)
- User Interaction (UI): None (N)
- Scope (S): Changed (C)
- Confidentiality (C): High (H)
- Integrity (I): High (H)
- Availability (A): High (H)
- Modified Attack Vector (MAV): Network (N)
- Modified Attack Complexity (MAC): Low (L)
- Modified Privileges Required (MPR): None (N)
- Modified User Interaction (MUI): None (N)
- Modified Confidentiality (MC): High (H)
- Modified Scope (MS): Changed (C)
- Modified Integrity (MI): High (H)
- Modified Availability (MA): High (H)
Activity log
- Created & dismissed (no matching packages found) suggestion
prebid-server's request forgery vulnerability allows for possible host environment data extraction
Prebid Server is an open-source solution for running real-time advertising auctions in the cloud. Prior to version 4.4.0, certain bidder adapters in Prebid Server interpolate user-supplied parameters into outbound request URLs without properly validating host and subdomain values, allowing crafted bid request parameters to cause server-side requests to unintended destinations and potentially expose internal network services or sensitive server endpoints. This issue is fixed in version 4.4.0.
References
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https://github.com/prebid/prebid-server/security/advisories/GHSA-4p3g-4hcj-wpvx x_refsource_CONFIRM
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https://github.com/prebid/prebid-server/pull/4802 x_refsource_MISC
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https://github.com/prebid/prebid-server/releases/tag/v4.4.0 x_refsource_MISC
Affected products
prebid-server
- ==< 4.4.0